I can't speak for the A320 but this is a very common sight on smaller aircraft (Piper Cherokee, C172, etc.) In my experience it can be accomplished with a well executed soft field landing followed by minimal braking. My instructor and I would make the last landing of a lesson a soft-field and see if we could get the plane to its tie-down without compressing the nose strut..
In the case of that photo, however, my guess would be a combination of an aft CG and an overserviced nose strut. A light touchdown followed by a long rollout on arrival could play some roll, though.
I'm interested to hear from any A320 pilots or mechanics on this one.
Rule #176. Any device that can crawl across the table on medium, does not need to be brought into the office.